TRA Elevation is one of the methods used for Taiwan's "three-dimensional transport program", to solve the problem of railway lines barricading urban areas into pieces and causing traffic bottlenecks due to safety concerns of ground-level crossings, and limited overpasses or underpasses. The urban section of the original ground-level railway is elevated, or new sections of the tracks are built elevated from the start. Most of the railway treated this way is part of the national railway network in long-distance passenger or commuter rail rather than the urban rail transit system.[1]
Other three-dimensional transport programs in addition to the "elevated" include: underground railway, constructing new highway crossings above the railroad, the construction of an outer ring railway to bypass urban areas, establishing new train stations in urban fringes as well as a series of programs to solve the problem of urban railway separation.
Taiwan Railways Administration operates routes for western Taiwan urban area, ground railways and influence on road traffic submitted improvement projects, via Ministry of Transportation Railway Reconstruction Engineering Bureau (originally named "Ministry of Transportation Taipei urban area Underground Railway Engineering Bureau") and Taiwan Railway Administration (Taoyuan Elevated Railway) to office, part of engineering has been listed in New Ten Major Construction Projects of TRA MRTizion project.
In recent years, elevation of TRA line segments has been completed at the following locations: